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Finding the Fourth Proportional to 192,139.40, 288,036.30 and 121,982.60

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Solution

The fourth proportional to 192,139.40, 288,036.30 and 121,982.60 is: 182,864.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,139.40 : 288,036.30 = 121,982.60 : x
  2. Step 2: Convert to fraction form
    192,139.40/288,036.30 = 121,982.60/x
  3. Step 3: Cross multiply
    192,139.40x = 288,036.30 × 121,982.60
  4. Step 4: Simplify right side
    192,139.40x = 35,135,416,768.38
  5. Step 5: Solve for x
    x = 35,135,416,768.38/192,139.40
  6. Step 6: Final answer
    x = 182,864.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.